Synchronous pressing mechanism suitable for air tightness detection of battery frame

Abstract

The utility model discloses a synchronous pressing mechanism suitable for air tightness detection of a battery frame, which comprises a mounting bracket, a pressing plate capable of moving up and down is mounted on the mounting bracket through a main cylinder, four synchronous rotating shafts are rotatably mounted at the top of the mounting bracket, and the four synchronous rotating shafts are distributed in a rectangular shape. The ends of every two adjacent synchronous rotating shafts are in transmission connection through a bevel gear set. Four transmission rods distributed in a rectangular shape are fixedly installed on the upper side of the pressing plate, all the four transmission rods extend upwards in the vertical direction and are arranged on the radial sides of the four synchronous rotating shafts in a one-to-one correspondence mode, and strip-shaped tooth parts arranged in the height direction are arranged on all the transmission rods. The synchronous rotating shaft is fixedly sleeved with a gear meshed with the strip-shaped tooth part; the four transmission rods are distributed at the four corners of the pressing plate. The pressing mechanism has the advantages that the problems that stress on the four corners of a pressing plate of a traditional pressing mechanism is not uniform, and the sealing effect is poor are solved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically to a synchronous pressing mechanism suitable for airtightness testing of battery frames. Background Technology

[0002] With the widespread use of electronic devices and the increasing demand for portable power supplies, batteries have been widely used as energy storage devices. Battery frame airtightness testing is a crucial step in the battery manufacturing process. This test involves pressurizing or vacuuming the battery frame to detect any leakage risks, ensuring the internal environment of the battery is isolated from the external environment, preventing electrolyte leakage, and protecting the internal structure from external corrosion. Especially in large-scale applications such as electric vehicles and energy storage systems, battery safety is directly related to personal and property safety.

[0003] The battery frame airtightness testing device includes a pressing mechanism, which is used to press the frame to create a sealed environment inside the frame, thus facilitating airtightness testing through pressurization or vacuuming. Traditional pressing mechanisms use a single-cylinder drive, with the cylinder located in the middle of the pressure plate. Uneven force at the four corners and inconsistent speed during downward pressing can easily lead to poor sealing performance, directly affecting the test results. Utility Model Content

[0004] In view of this, the present invention provides a synchronous pressing mechanism suitable for battery frame airtightness testing, which aims to solve the problems of uneven force distribution at the four corners of the pressure plate and poor sealing effect in traditional pressing mechanisms.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A synchronous pressing mechanism for testing the airtightness of a battery frame includes a mounting bracket. A pressure plate is mounted on the mounting bracket, which can be moved up and down via a main cylinder. Four synchronous rotating shafts are rotatably mounted on the top of the mounting bracket. The four synchronous rotating shafts are arranged in a rectangular shape, and the ends of two adjacent synchronous rotating shafts are connected by a bevel gear set.

[0007] Four rectangular transmission rods are fixedly installed on the upper side of the pressure plate. All four transmission rods extend upward in the vertical direction and are arranged on the radial side of the four synchronous rotating shafts. Each transmission rod is provided with a strip toothed part arranged in the height direction. The synchronous rotating shaft is fixedly fitted with a gear that meshes with the strip toothed part.

[0008] The four transmission rods are located at the four corners of the pressure plate.

[0009] With the above structure, the main cylinder drives the pressure plate to move downward, the transmission rod is driven to move downward, and the gear meshing with the bar tooth section rotates, driving the four synchronous rotating shafts to rotate. The ends of the four synchronous rotating shafts are connected by a bevel gear set, which forces the four synchronous rotating shafts to keep horizontal and synchronous, so as to realize the synchronous pressing of the pressure plate and improve the sealing effect of the pressure plate.

[0010] Preferably, the mounting bracket is equipped with four auxiliary cylinders at the four corners corresponding to the pressure plate. With this structure, the pressure plate experiences uniform force at its four corners, resulting in a better sealing effect.

[0011] Preferably, four guide rods are mounted vertically on the mounting bracket, with the four guide rods distributed at the four corners of the pressure plate and their lower ends fixed to the pressure plate. This structure makes the movement of the pressure plate more stable.

[0012] Preferably, the mounting bracket has four rotating shaft mounting components fixedly mounted on its top. Each rotating shaft mounting component includes a hollow housing and a mounting base located at the bottom of the hollow housing. The mounting base is fixedly mounted on the mounting bracket. Bearing holes are formed in the side wall of the hollow housing, and the synchronous rotating shaft is mounted in the bearing holes through bearings. This structure facilitates installation.

[0013] Preferably, the gear is located inside the hollow housing. This structure protects the gear and prevents surface wear.

[0014] Preferably, a connecting frame is fixed to the upper side of the pressure plate, and the main cylinder, auxiliary cylinder, and guide rod are all connected to the connecting frame. This structure facilitates installation and avoids affecting the levelness of the pressure plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. A main cylinder is located in the middle of the pressure plate, and four auxiliary cylinders are located at the four corners. The pressure plate is driven simultaneously from the middle and the four sides, so the force is evenly distributed.

[0017] 2. The main cylinder drives the pressure plate to move downward, and the transmission rod is driven to move downward. The gear meshing with the bar tooth section rotates, driving the four synchronous shafts to rotate. The ends of the four synchronous shafts are connected by a bevel gear set, which forces the four synchronous shafts to keep horizontal and synchronous, so as to realize the synchronous pressing of the pressure plate and improve the sealing effect of the pressure plate.

[0018] 3. The gears are housed inside the hollow housing, which protects them and prevents wear on their surfaces. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 A schematic diagram illustrating the connection of synchronous shaft 2;

[0021] Figure 3 This is a schematic diagram illustrating the installation layout of this utility model;

[0022] Figure 4 This is a schematic diagram showing the internal structure of the hollow shell 91. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0024] like Figure 1 and Figure 3 As shown, a synchronous pressing mechanism suitable for testing the airtightness of a battery frame includes a mounting bracket 1 at the top of the testing mechanism. The mounting bracket 1 includes a frame 11 and five horizontal mounting plates 12 fixed on the frame 11. The five horizontal mounting plates 12 are located at the middle and four corners of the frame 11. A main cylinder 3 is mounted on the middle mounting plate 12, and four auxiliary cylinders 7 are mounted on the four corner mounting plates 12. The output ends of the cylinders are connected to pressure plates 4, allowing the pressure plates 4 to move up and down. A connecting frame 10 is fixed on the upper side of the pressure plate 4. The connecting frame 10 includes a connecting frame 101 and horizontal connecting plates 102. The horizontal connecting plates 102 correspond to the middle and four corners of the pressure plate 4, and the cylinder output ends are connected to the pressure plates 4 through the horizontal connecting plates 102. When the testing mechanism tests the airtightness of the frame, the five cylinders simultaneously drive the pressure plates 4 to press down. Four guide rods 8 are also mounted on the mounting bracket 1, which can move up and down. The four guide rods 8 are distributed at the four corners of the pressure plates 4, enabling the pressure plates to remain vertically pressed down.

[0025] like Figure 2 and Figure 4 As shown, four synchronous rotating shafts 2 are rotatably mounted on the top of the mounting bracket 1 via a rotating shaft mounting component 9. The four synchronous rotating shafts 2 are arranged in a rectangular pattern and are connected at their ends by a bevel gear set 5. Four rectangular transmission rods 6 are fixedly mounted on the upper side of the horizontal connecting plate 102. All four transmission rods 6 are cylindrical, extending upward in the vertical direction, and are arranged on the radial side of the four synchronous rotating shafts 2 respectively. Each transmission rod 6 is provided with a strip-shaped toothed part 61 arranged in the height direction. A gear 21 that meshes with the strip-shaped toothed part 61 is fixedly sleeved at the end of the synchronous rotating shaft 2.

[0026] like Figure 4 As shown, each of the shaft mounting components 9 includes a hollow housing 91 and a mounting base 92 located at the bottom of the hollow housing 91. The mounting base 92 is fixedly mounted on the horizontal mounting plates 12 at the four corners. The side wall of the hollow housing 91 has bearing holes 91a, and the synchronous shaft 2 is mounted in the bearing holes 91a through bearings. The gear 21 is located inside the hollow housing 91, and the transmission rod 6 is located inside the synchronous shaft 2, extending upward through the hollow housing 91.

[0027] When the battery frame undergoes an airtightness test, the main cylinder 3 and the four auxiliary cylinders 7 at the four corners are simultaneously driven, pushing the pressure plate 4 connected to their output ends downwards. For example... Figure 1 As shown, the transmission rods 6 at the four corners move downwards synchronously with the pressure plate 4. The gears 21 that mesh with the strip teeth 61 on the transmission rods 6 rotate, forcing the synchronous shafts 2 to rotate. The ends of two adjacent synchronous shafts 2 are connected by a bevel gear set 5, forcing all four synchronous shafts 2 to rotate synchronously, thus achieving a horizontal effect. The pressure plate 4 presses down synchronously, with uniform force at the four corners at consistent speeds, which can better compress the battery frame and improve the accuracy of the test.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A synchronous pressing mechanism for testing the airtightness of a battery frame, comprising a mounting bracket (1), wherein a pressure plate (4) is mounted on the mounting bracket (1) via a main cylinder (3) and is movable up and down, characterized in that: The mounting bracket (1) has four synchronous rotating shafts (2) rotatably mounted on its top. The four synchronous rotating shafts (2) are arranged in a rectangular shape, and the ends of two adjacent synchronous rotating shafts (2) are connected by a bevel gear set (5). Four rectangular transmission rods (6) are fixedly installed on the upper side of the pressure plate (4). The four transmission rods (6) extend upward in the vertical direction and are arranged on the radial side of the four synchronous rotating shafts (2) respectively. Each transmission rod (6) is provided with a strip tooth (61) arranged in the height direction. The synchronous rotating shaft (2) is fixedly fitted with a gear (21) that meshes with the strip tooth (61). The four transmission rods (6) are distributed at the four corners of the pressure plate (4).

2. The synchronous pressing mechanism for detecting the airtightness of a battery frame according to claim 1, characterized in that: The mounting bracket (1) is equipped with four auxiliary cylinders (7) at the four corners of the pressure plate (4).

3. The synchronous pressing mechanism for detecting the airtightness of a battery frame according to claim 2, characterized in that: Four guide rods (8) are mounted on the mounting bracket (1) and can be moved up and down. The four guide rods (8) are distributed at the four corners of the pressure plate (4) and the lower end is fixed to the pressure plate (4).

4. The synchronous pressing mechanism for detecting the airtightness of a battery frame according to claim 1, characterized in that: The mounting bracket (1) is fixedly provided with four rotating shaft mounting components (9) on the top. Each rotating shaft mounting component (9) includes a hollow shell (91) and a mounting base (92) located at the bottom of the hollow shell (91). The mounting base (92) is fixedly mounted on the mounting bracket (1). The hollow shell (91) has a bearing hole (91a) on its side wall. The synchronous rotating shaft (2) is mounted in the bearing hole (91a) through a bearing.

5. A synchronous pressing mechanism for detecting the airtightness of a battery frame according to claim 4, characterized in that: The gear (21) is located inside the hollow housing (91).

6. A synchronous pressing mechanism for detecting the airtightness of a battery frame according to claim 3, characterized in that: A connecting frame (10) is fixed on the upper side of the pressure plate (4), and the main cylinder (3), auxiliary cylinder (7), and guide rod (8) are all connected to the connecting frame (10).

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